Possible Clues:

• The last of the Da
• This comes at last
• ___ and 36-Across (two of life's certainties)
• Necrophobiac's fear
• ''___ in Venice''
• In homicide, a throttling heralds this
• Fatality
• 24/5/6/8/__ - where the 26/15 rode, according to Tennyson
• Metallica "___ Magnetic"
• One of life's certainties